Cover Reveal: TERRA Infirma, Book 2 in the Terra Trilogy Cover Reveal: TERRA Infirma, Book 2 in the Terra Trilogy By Karen Abrahamson | April 4, 2012 I’m thrilled to be able to post the cover of the sequel to TERRA Incognita. Again the fantastic artistry of Cristina Otero provides the model of Terra coming apart from her power. The book will be available April 2012.